Wearable smart device having flexible semiconductor package mounted on a band

ABSTRACT

A wearable smart device of the present invention comprises: a main body on which a basic module is mounted; a band on which at least one auxiliary module is mounted, which is selectively attached and detached to the main body made of a polymer material or a rubber material to be bent; a connector electrically connecting the main body and the band; and a coupler physically connecting the main body and the band. According to a configuration of the present invention, the present invention is possible in realizing a high-capacity and high-performance smart device.

TECHNICAL FIELD

The present invention relates to a wearable smart device having aflexible semiconductor package mounted in a band for realizing ahigh-capacity and high-performance function, and more particularly, to awearable smart device in which, in a smart watch or a smart computersystem worn on a wrist for ensuring mobility, all functional modules areconventionally embedded in a main body so that space constraints followsand it is difficult to realize a multifunctional high capacity, however,each auxiliary module is designed to be able to exchange in a band bypacking in units, and scalability is significantly improved byselectively arranging the module in a customized manner according touser's purpose for healthcare, fitness, learning, living, office work,games, or music.

BACKGROUND ART

Recently, as electronic products are being made in a small size, smartwatches that can be worn at a place with good accessibility such aswrists or ends of shirt sleeves are being released.

Such smart watches have an advantage of providing mobility andconvenience. However, in smart watches, a display area is small and avolume of the main body is so low that checking time, simple calls, orother data communication is possible, and there is a problem in thatfunctions and capacity are considerably limited.

Meanwhile, a device required for a smart watch may include variouselectronic circuit elements. The electronic circuit elements may beintegrated into a semiconductor substrate called a semiconductor chip ordie. A semiconductor chip package is employed in electronic productssuch as computers, mobile devices, or data storages.

However, as the demand for mobility of an electronic product such as asmart watch increases, interest in a stacked package structure that canbe bent or curved is increasing.

As interest in wearable electronics that can be worn on the face in theform of glasses or on the wrist in the form of a watch or braceletrequiring mobility has increased, flexibility characteristics such asbending or curving is required in the electronic products.

DISCLOSURE Technical Problem

The present invention is directed to providing a wearable smart devicehaving a semiconductor package structure in which functions are notrestricted even when curved or bent according to a mobility requirementof a smart device.

The present invention is directed to providing a wearable smart devicein which various modules having different functions according to auser's purpose can be mounted in selectively packaged in units.

The present invention is directed to providing a wearable smart devicein which a smart device that requires high capacity, such as a memorymodule or a battery module, can compensate using wireless datacommunication or wireless charging technology.

Technical Solution

One aspect of the present invention provides a wearable smart device.The wearable smart device includes a main body in which a basic moduleis mounted, a band in which at least one auxiliary module is mounted andwhich is selectively attached to and detached from the main body and isformed of a polymer material or a rubber material to be bent, aconnector configured to electrically connect the main body to the band,and a coupler configured to physically connect the main body to theband.

Another aspect of the present invention provides a wearable smartdevice. The wearable smart device includes a main body in which a basicmodule is mounted, a band electrically connected to the main body andbent, and auxiliary modules having respective functions and selectivelymounted in the band in a prefabricated manner.

Still another aspect of the present invention provides a wearable smartdevice. The wearable smart device includes a main body in which a basicmodule is mounted, a band integrally connected to the main body andbent, and an auxiliary module formed with a flexible semiconductorpackage, embedded into the band, and electrically connected to the basicmodule, wherein the flexible semiconductor package includes a flexibleprinted circuit board (PCB) including a flexible wiring pattern, asemiconductor die stacked on the flexible PCB and connected to theflexible PCB using wire bonding or flip-chip bonding, and a flexiblemold configured to protect the flexible semiconductor die.

Advantageous Effects

According to a configuration of the present invention, the followingeffects can be expected.

First, a conventional wearable band is manufactured by inserting allmodules and memories into a main body, but there is a clear limit torealizing high multifunctional capacity due to spatial restrictions.However, in the present invention, modules are inserted into a bandrather than a main body, more modules can be used by utilizing themodules in a detachable form that is suitable for user convenience, andthe modules can be selected according to a user's purpose andcharacteristics, and thus the conventional functions can be expanded.

For example, in addition to a basic battery of a main body, an auxiliarybattery is mounted in a band for battery extension so that a wearableband can be operated using the battery in the band even when the basicbattery has been fully discharged. It is possible to charge through awireless charger without a separate charging cable by inserting awireless charging module into the band.

Second, as described above, when devices are manufactured using aflexible substrate instead of a rigid substrate and a packaging processis performed thereon, the flexible substrate can be wound around asupply roll and a wiring pattern can be formed on the flexible substratewhile the substrate wound around the supply roll is being wound, suchthat mass production using a roll-to-roll process is possible.

DESCRIPTION OF DRAWINGS

FIGS. 1A and 1B are perspective views each illustrating a configurationof a wearable smart device with a replaceable band according to thepresent invention.

FIG. 2 is a cross-sectional view illustrating a configuration of aflexible semiconductor package according to the present invention.

FIG. 3 is a perspective view illustrating flexible bands connected usinga block type connection according to the present invention.

FIG. 4 is an exemplary view illustrating examples of a band for games, aband for office work, and a band for music according to the presentinvention.

FIG. 5 is a perspective view illustrating a configuration of a wearablesmart device with a replaceable module according to the presentinvention.

FIG. 6 is a perspective view illustrating a configuration of anindependent-band wearable smart device according to the presentinvention.

FIG. 7 is a perspective view illustrating a configuration of afixed-band wearable smart watch according to the present invention.

FIGS. 8A and 8B are a perspective view and a cross-sectional viewaccording to an embodiment in which a chip on board (COB) package and anelectric double-layer capacitor (EDLC) are vertically arranged in awireless rechargeable battery according to the present invention.

FIGS. 9A and 9B are a perspective view and a cross-sectional viewaccording to another embodiment in which a COB package and an EDLC arehorizontally arranged in a wireless rechargeable battery according tothe present invention.

FIG. 10 is a perspective view illustrating a configuration of a banddivided into a plurality of blocks according to the present invention.

FIG. 11 is a perspective view illustrating a configuration of a smartwatch including a replaceable band according to the present invention.

FIG. 12 is a perspective view illustrating a configuration of anindependent band according to the present invention.

FIG. 13 is a view illustrating a state of use of wireless chargingaccording to the present invention.

MODES OF THE INVENTION

Advantages and characteristics of the present invention and a method ofachieving the advantages and characteristics will be clear by referringto exemplary embodiments described below in detail together with theaccompanying drawings. However, the present disclosure is not limited tothe following exemplary embodiments but may be implemented in variousdifferent forms. The exemplary embodiments are provided only to completedisclosure of the present disclosure and to fully provide a personhaving ordinary skill in the art to which the present disclosurepertains with the category of the disclosure, and the present disclosurewill be defined by the appended claims. In the drawings, a size and arelative size of a layer or an area may be exaggerated for clarity ofdescription. Like reference numerals indicate like components throughoutthe specification.

The exemplary embodiments of the invention will be described withreference to plan views and cross-sectional views, which are idealexemplary views. Forms of the embodiments may be modified by themanufacturing technology and/or tolerance. Therefore, the embodiments ofthe invention are not intended to be limited to illustrated specificforms, and include modifications of forms generated according to themanufacturing processes. Therefore, areas illustrated in the drawingshave overview properties, shapes of the areas are illustrated specialforms of the areas of a device, and are not intended to limit the scopeof the invention.

Hereinafter, preferred embodiments of a wearable smart device in which aflexible semiconductor package is mounted in a band according to thepresent invention having the above-described configuration will bedescribed in detail with reference to the accompanying drawings.

In the present invention, a semiconductor package may be modularized andattached to and detached from a main body while being mounted in a band,a semiconductor package may be packaged in a rubber pack in units andselectively mounted in a band integrally connected to a main body, or asemiconductor package may be configured as an independent band so as tobe separated from a main body.

In this case, when the semiconductor package is curved, tensile stressor compressive stress locally acts on a printed circuit board (PCB) anda semiconductor die, and a wiring pattern included in the PCB is damagedor the semiconductor die is separated, such that the semiconductorpackage needs to include a flexible PCB, one or more flexiblesemiconductor dies stacked on the flexible PCB and bonded to theflexible PCB by wire bonding or flip-chip bonding, and a flexible moldconfigured to protect the flexible semiconductor dies.

FIRST EMBODIMENT

FIGS. 1A and 1B are conceptual views each illustrating a configurationof a wearable smart device with a replaceable band according to thepresent invention. FIG. 1A illustrates a configuration in which a mainbody and a band have been separated, and FIG. 1B illustrates aconfiguration in which the main body and the band are electricallyconnected and then physically connected.

Referring to FIGS. 1A and 1B, in a wearable smart device 100 with areplaceable band according to an embodiment of the present invention, aband 120 itself may be exchanged from a main body 110 and variousfunctional modules may be mounted in the band 120. Therefore, the band120 in which the modules having respective functions are mounted may beattached to and detached from the main body 110. That is, the band 120having respective functions may be selectively coupled to the main body110.

The wearable smart device 100 with a replaceable band may include themain body 110 in which a basic module 102 is mounted, a band 120,capable of being bent or stretchable, in which auxiliary modules 112 a,112 b, 112 c, 112 d, and 112 e are mounted and which is selectivelyattached to and detached from the main body 110, a connector 130configured to electrically connect the main body 110 to the band 120,and a coupler 140 configured to physically connect the main body 110 tothe band 120.

The basic module 102 includes a conventional semiconductor package whichoperates a display or other smart device. Therefore, the basic module102 of the main body may include any module which enables a smart phone,a personal digital assistant (PDA), a handheld PC, a mobile phone, orother smart device having a similar function to operate.

Each of the auxiliary modules 112 a to 112 e cooperates with the basicmodule 102 to enhance a function of the basic module 102. For example,each of the auxiliary modules 112 a to 112 e may include a memory deviceor a non-memory device. Each of the auxiliary modules 112 a to 112 e mayinclude a battery. Each of the auxiliary modules 112 a to 112 e mayinclude a camera. Each of the auxiliary modules 112 a to 112 e mayinclude a speaker. Each of the auxiliary modules 112 a to 112 e mayinclude a light-emitting diode (LED) or a laser lighting.

In addition, each of the auxiliary modules 112 a to 112 e may furtherinclude an electrocardiogram sensor, a global positioning system (GPS),a micro secure digital (SD) slot, an auxiliary display for expanding thedisplay of the basic module 102, or the like. For example, anelectrocardiogram sensor may be used for biometric technology using,among biosignals, an electrocardiogram. To this end, anelectrocardiogram measuring sensor formed with bio-electrodes may beprovided in the band 120.

FIG. 2 is a cross-sectional view illustrating a configuration of aflexible semiconductor package. Referring to the drawing, the auxiliarymodules 112 a to 112 e may be formed with a flexible semiconductorpackage 10.

The flexible semiconductor package 10 includes a flexible PCB 14including a flexible wiring pattern 12, one or more flexiblesemiconductor dies 20 stacked on the flexible PCB 14 using an adhesivemember 16 and bonded to the flexible PCB 14 using a conductive member 18by wire bonding or flip-chip bonding, and a flexible mold 22 configuredto protect the flexible semiconductor dies 20.

The flexible PCB 14 may be bent or curved. The flexible PCB 14 may evenbe folded. To this end, the flexible PCB 14 may be formed of a polymermaterial. For example, the flexible PCB may be representatively formedof polyimide (PI), polyester, polyethylene naphthalate (PEN), Teflon,polyethylene terephthalate (PET), or other polymeric materials.

The flexible wiring pattern 12 electrically connected to the conductivemember 18 is formed on the flexible PCB 14. The flexible wiring pattern12 may form a curved conductive film including a flexible material suchas copper (Cu), titanium (Ti), aluminum (Al), or a metal alloy.

The flexible wiring pattern 12 may include a conductive metal wiringformed through a deposition process using a lithography method and anetching process. For the sake of flexibility, the flexible wiringpattern 12 may include a conductive metal wiring formed by printing aconductive ink using a printing method.

Alternatively, when a portion of the substrate is removed by laseretching on a PI substrate and a wiring pattern is then formed bydepositing a conductive metal, the flexible wiring pattern has adisadvantage in that material consumption is large and the process iscomplex due to repeated deposition and etching. Therefore, a metalwiring is first formed on a rigid substrate, a hardening polymer iscoated thereon and cured, the rigid substrate is physically removed, andthen the flexible substrate on which a wiring pattern is formed on thePI (flexible) substrate may be manufactured.

The flexible semiconductor die 20 may include a memory device or a logicdevice. The devices are integrated on a silicon substrate, but athickness of the silicon substrate is not more than several tens ofmicrometers so that the silicon substrate may be curved. The flexiblesemiconductor die 20 may have a structure in which one or more chips arestacked using the adhesive member 16.

The adhesive member 16 may include a polymer material having excellentadhesion. A material having strong adhesion is required so that theflexible PCB 14 and the flexible semiconductor die 20 are not detachedor separated and are stably coupled even when the flexible PCB 14 iscurved or bent, in comparison to the rigid substrate.

The flexible mold 22 may be formed of a material to be curved or bent.For example, the flexible mold 22 may include a material capable ofproviding stress. The flexible mold 22 may include a polymer, rubber, oran elastomer. Alternatively, the flexible mold 22 may include PI.

For example, the flexible mold 22 should expand or contract even whenthe flexible semiconductor die 20 or the flexible semiconductor package10 is arbitrarily curved or bent, and damage to the flexible mold 22 dueto stress should be prevented even when stress occurs due to expansionand contraction. This is because when the flexible wiring pattern 12formed on the flexible PCB 14 is cut or is separated from the flexiblePCB 14 while the flexible semiconductor package 10 is bent or stretched,the flexible wiring pattern 12 can no longer function as a semiconductordevice due to contact failure.

The band 120 is replaceable. The band 120 may be removed bydisassembling the coupler 140 configured to connect the main body 110 tothe band 120 and separating the connector 130 therefrom.

Referring to FIG. 3, in the band 120, a plurality of rigid bands may becoupled by a hinge pin, a hinge, or the like and may be curved. Therigid bands may be connected using a block type connection, and abending band may be realized by designing each of the block bands to berotatable by a certain angle. That is, the band 120 may be sufficientlycurved or bent even though the band 120 is not flexible.

Referring again to FIG. 1A, the band 120 may exhibit elasticity as anintegrated flexible band.

The curving or bending band 120 may be formed of a flexible polymermaterial or rubber material. The curving or bending band 120 may beformed, among polymers, of PI. When the flexible band is formed of sucha material, even when the flexible band is curved, tensile stress orcompressive stress is applied to the semiconductor package or thesemiconductor die so that the semiconductor package or the semiconductordie is not damaged.

FIG. 4 illustrates configurations of bands for various purposesaccording to the present invention. Referring to the drawing, each band120 may be prepared for use according to the needs of a user. The bands120 may be used for health care, fitness, learning, living, office work,games, music, and the like according to a purpose of the user.

As illustrated in FIG. 4A, a band for game may include a plurality ofbattery modules, a memory module, a camera module, and a speaker modulein consideration of large battery consumption.

As illustrated in FIG. 4B, a band for office work may include a batterymodule, a memory module, a laser point module, a power point buttonmodule, and an LED module.

As illustrated in FIG. 4C, a band for music may include a plurality ofmemory modules because the band for music requires a large memorycapacity, a battery module, an LED module, and a speaker module.

Referring again to FIGS. 1A and 1B, the connector 130 includes a firstconnector provided at one side of the band 120 and a second connectorprovided at one side of the main body 110, so that the band 120 iselectrically connected to the main body 110. For example, the connector130 may be divided into a 4-pin male type connector and a 4-pin femaletype connector.

The basic module 102 of the main body 110 and the auxiliary modules 112a to 112 e of the band 120 may communicate with each other using theconnector 130 in a wired manner. Although wired communication using theconnector 130 is described as an example in the embodiment of thepresent invention, the basic module 102 and the auxiliary modules 112 ato 112 e may communicate with each other in a wireless manner, with orwithout omitting the connector.

In this case, a coupling depth of the connector may be increased forstable connection, and silicon or rubber molding processing may beperformed on a coupling portion of the connector 130 for waterproofing.

The coupler 140 includes a first coupler provided at one side of theband 120 and a second coupler provided at one side of the main body, sothat the band 120 is not arbitrarily separated from the main body 110.For example, the coupler 140 may fix a ring by hooking the ring to ahook. Alternatively, the coupler 140 may be designed to be attached anddetached using a stopper or a spring. There are no restrictions on acoupling method.

SECOND EMBODIMENT

In a wearable smart device according to another embodiment of thepresent invention, a band may be fixedly coupled to a main body.However, modules having various functions may be mounted so as to beexchanged from the band. Therefore, the modules having respectivefunctions may be attached to and detached from the band.

FIG. 5 illustrates a configuration of a wearable smart device with areplaceable module according to the present invention.

Referring to FIG. 5, a wearable smart device 200 with a replaceablemodule includes a main body 210 in which a basic module 202 is mounted,a bending band 220 electrically connected to the main body 210, andauxiliary modules 212 a, 212 b, 212 c, 212 d, and 212 e havingrespective functions selectively mounted in the band 220.

The auxiliary modules 212 a, 212 b, 212 c, 212 d, and 212 e are packagedin a polymer pack or a rubber pack (not illustrated) in units, and amounting slot (not illustrated) in which the rubber pack is mounted isprovided in the band. In this case, a depth of the mounting slot may beincreased for stable mounting, and silicon or rubber molding processingmay be performed to prevent water from penetrating a region around themounting slot. Meanwhile, the mounting slot may include a plurality ofconnection terminals (not illustrated) configured to electricallyconnect the auxiliary modules 212 a, 212 b, 212 c, 212 d, and 212 e tothe basic module 202.

Here, since functions of the basic module 202 and the auxiliary modules212 a, 212 b, 212 c, 212 d, and 212 e are the same as those of theabove-described embodiment, descriptions thereof will be omitted.

However, the rubber pack may be formed of a flexible polymer, rubber, orother elastomer. The rubber pack may be formed, among polymers, of PI.When the rubber pack is formed of such a material, even when the rubberpack is curved, tensile stress or compressive stress is applied to anembedded chip of the semiconductor package so that the embedded chip ofthe semiconductor package is not damaged.

THIRD EMBODIMENT

In a wearable smart device according to a third embodiment of thepresent invention, an independent band is provided separately from amain device, and the independent band may enable wireless datatransmission and wireless power transmission through short rangecommunication with a main body of the main device.

The main device and the independent band may be provided on the samewrist so as to be separated from each other, or the main device may beprovided on a left hand and the independent band be provided on a righthand, respectively.

FIG. 6 illustrates a configuration of an independent-band wearable smartdevice according to the present invention.

Referring to FIG. 6, an independent-band wearable smart device 300includes main devices 100 and 200 including main bodies 110 and 120 andmain bands 210 and 220, and an independent band 320 capable of enablingwireless data transmission through short range communication with themain devices 100 and 200 and charging a battery through wireless powertransmission.

The independent band 320 includes independent modules 312 a, 312 b, 312c, 312 d, and 312 e. The independent band 320 may be a flexible,shrinkable, and closed ring type. The independent band 320 may be madeof a PI material as described above.

To this end, the independent modules 312 a to 312 e of the independentband 320 may include a Bluetooth module, an infrared communicationmodule, a Zigbee module, and the like, which enable wirelesscommunication because the modules have various communication functionssuch as communication via network, specifically short range wirelesscommunication, and thus may communicate with the basic modules 102 and202 of the main bodies 110 and 120 having a wireless communicationmodule or the auxiliary modules 112 a to 112 e in real-time.Alternatively, the independent modules 312 a to 312 e of the independentband 320 may wirelessly transmit power.

Data transmission and power transmission with the main devices 100 and200 may be performed using the independent band 320 using wireless powerconsortium (WPC) technology and near field communication (NFC)technology. For example, an NFC coil may be provided in each of themodules for short range communication to transmit and receive data, anda WPC coil may be provided in each of the modules for wireless powertransmission for wireless charging.

Specifically, in the present invention, when a WPC wireless chargingmodule is mounted in any one of the auxiliary modules 112 a and 212 a orthe independent module 312 a, it is possible to charge through awireless charger without a separate charging cable.

FOURTH EMBODIMENT

Although not illustrated in the drawings, an integrated-band wearablesmart device of the present invention may be integrally formed with amain body to ensure water-tightness or waterproofness without bandreplacement.

An integrated-band or fixed-band wearable smart device may include amain body in which a basic module is mounted, a flexible band integrallyconnected to the main body, and an auxiliary module which is embedded inthe band and electrically connected to the basic module.

As described above, the flexible band may be integrally connected to themain body and electrically connected to the main body through aconnector, but may be permanently connected to the main body withoutdetachment.

FIFTH EMBODIMENT

Referring to FIG. 7, a wearable smart watch 1100 according to anembodiment of the present invention includes a main body 1110 in which abasic module 1102 is mounted, and a bendable and flexible band 1120. Abattery 1112 which supplies power to the basic module 1102 is mounted inthe band 1120. Accordingly, the battery 1112 is flexible along with theband 1120.

The basic module 1102 includes a conventional semiconductor packagewhich operates a display or other smart watch. Therefore, the basicmodule 1102 of the main body 1110 may include any module which enables asmart phone, a PDA, a handheld PC, a mobile phone, or other smart devicehaving a similar function to operate.

WPC technology for wireless power transmission may be applied to thebattery 1112. Since the smart watch 1100 is used while being worn on thewrist, water-tightness should be substantially ensured. A port intowhich a charging jack is inserted should be open in order to chargeusing a wired cable. However, the port inhibits waterproofness.Therefore, in the wearable smart watch 1100, the port is omitted forwater-tightness and wireless charging is preferably realized.

Accordingly, the battery 1112 of the present invention includes awireless charging reception module 1114 configured to receive anelectromagnetic wave from a wireless charging transmission module (notillustrated), and includes a capacitor module 1116 configured to storeelectrical energy generated by the wireless charging reception module1114.

In the present invention, the wireless charging reception module 1114may be provided in the form of a chip on board (COB) package. Forexample, in a COB package 1010 of the present invention, an antenna tag1014 is formed integrally in the form of COB. The COB package 1010 maybe formed by stacking at least two layers of COB sheets in order toincrease a dynamic frequency.

The COB package 1010 includes a flexible substrate 1016, an antenna tag1014 formed above the flexible substrate 1016, and a protective member1018 which is insulating and adhesive to protect the antenna tag 1014.The antenna tag 1014 may be an annular coil in the form of a circle or asquare and may receive electromagnetic waves which are wirelessly outputat a frequency of approximately 150 KHz from a wireless chargingtransmitter module (not illustrated) of a charger.

An integrated circuit (IC) chip 1012 may include a rectifier, aregulator, a modulator, a microprocessor controller unit (MCU), or thelike for effective wireless charging. A bonding layer bonded to thecapacitor module 1116 may be formed at one side of the antenna tag 1014.

The flexible substrate 1016 may be designed to be flexible so as to becurved or folded. To this end, the flexible substrate 1016 may be formedof a polymer material. For example, the flexible substrate 1016 may beformed of PI, PET, or other polymeric material.

The capacitor module 1116 may be a rechargeable secondary batterycapable of repeatedly charging and discharging, and may include anelectric double-layer capacitor (EDLC) made of carbon. However, in thepresent invention, in order to apply the capacitor to the band 1120having a large surface area and a small thickness, an EDLC 1030 in whichactivated carbon electrodes are disposed with a separator interposedtherebetween is preferably used. Further, the EDLC 1030 is advantageousin realizing the flexible band 1120.

The EDLC 1030 includes a pair of electrodes 1036 which is provided onthe flexible substrate 1032 and disposed above and below an insulatingseparator 1034 interposed therebetween, an insulator 1038 which coversside surfaces of the electrodes 1036 and divides the capacitor intounits, and a pair of conductive metal covers 1042 which performs acurrent collecting function and covers the top and bottom of theelectrodes 1036 using a conductive binder.

Activated carbon electrodes into which an electrolytic solution ispermeated may be used as the electrodes 1036. Ion permeablepolypropylene or other porous materials may be used as the separator1034. Glass having an excellent insulating property may be used as theinsulator 1038. A flexible aluminum foil having an excellent currentcollecting property may be used as the metal covers 1042.

The flexible substrate 1032 may be designed to be flexible so as to becurved. A polymer film may be used as the flexible substrate 1032. PENor PET is flexible and suitable for the flexible substrate 1032.

The flexible substrate 1016 of the COB package 1010 and the flexiblesubstrate 1032 of the EDLC 1030 may be used in substantially the sameway.

To this end, a structure in which the COB package 1010 and the EDLC 1030are arranged at a right side and a left side as illustrated in FIGS. 9Aand 9B is more advantageous than a structure in which the COB package1010 and the EDLC 1030 are vertically arranged as illustrated in FIGS.8A and 8B. That is, a rigid region and a flexible region are repeatedlyarranged, so that the band 1120 may be naturally curved or bent withrespect to the flexible region.

Referring to FIG. 10, a plurality of rigid bands may be coupled by ahinge pin, a hinge, or the like so that the band 120 may be curved.Rigid bands are connected using a block type connection, and a bendingband may be realized by designing each of the block bands to berotatable by a certain angle. When a plurality of nodes is formed, theband 1120 may be sufficiently curved or bent even though the band 1120is not flexible.

Referring to FIG. 11, the band 1120 described above is replaceable. Theband 1120 may be exchanged from the main body 1110, and the plurality ofbatteries 1112 may be mounted in the band 1120, and the band 1120 inwhich the battery 1112 is mounted may be attached to and detached fromthe main body 1110.

To this end, the smart watch 1100 of the present invention may include,in addition to the main body 1110 and the band 1120, a connector 1130configured to electrically connect the main body 1110 to the band 1120and a coupler 1140 configured to physically connect the main body 1110to the band 1120. Therefore, the band 1120 may be removed bydisassembling the coupler 1140 configured to connect the main body 1110to the band 1120 and by separating the connector 1130.

The connector 1130 may include a pair of protruding and depressedconnectors so that the band 1120 is electrically connected to the mainbody 1110. The battery 1112 of the band 1120 may provide power to thebasic module 1102 of the main body 1110 using the connector 1130. Inthis case, silicon or rubber molding processing may be performed on acoupling portion of the connector 1130 for waterproofing.

The coupler 1140 may be configured of a pair of hooks so that the band1120 is not arbitrarily separated from the main body 1110.

Meanwhile, when a pair of left and right bands 1120 are fastened usingbuckles, bands 1120 a and 1120 b are fastened to both sides of the mainbody 1110. Therefore, when the band 1120 a at one side and the main body1110 are electrically connected through the connector 1130, since poweris continuously supplied even when the band 1120 b at the other sidebecomes separated from the main body 1110, the power may be maintainedthrough the band 1120 a at one side without rebooting while the battery1112 is exchanged.

Referring again to FIG. 7, the band 1120 may exhibit elasticity as anintegrated flexible band. The curved or folded band 1120 may be formedon a flexible polymer material or rubber material. The curved or foldedband 1120 may be formed, among polymers, of PI. When the flexible bandis formed of such a material, even when the flexible band is curved,tensile stress or compressive stress is applied to a semiconductorpackage or a semiconductor die so that the semiconductor package or thesemiconductor die is not damaged.

Meanwhile, a spare battery band may be provided and may be designed soas to be exchanged with a used band after charging. Specifically, whenthe smart watch 1100 is used for a gaming purpose, a large amount of thebattery 1112 is consumed. In this case, it is necessary to supply powerthrough a separate independent band 1320.

According to another embodiment of the present invention, theindependent band 1320 may be provided separately from the main smartwatch 1100, and the independent band 1320 may be designed to be fastenedto the main body 1110 or the band 1120 of the main smart watch 1100.

Referring to FIG. 12, an independent-band wearable smart device 1300includes a main smart watch 1100 including a main body 1110 and a band1120, and includes an independent band 1320 provided at one side of thesmart watch 1100 and fastened to the main body 1110 or the band 1120.

The independent band 1320 includes one or more batteries 1112. Theindependent band 1320 may be a flexible, shrinkable, and closed ring(loop) type. The independent band 1320 may be made of a PI material asdescribed above.

Referring to FIG. 13, the independent band 1320 may be charged using acharger P. When charging is completed, the independent band 1320 isfastened to the main smart watch 1100 as illustrated in FIG. 6 to applypower to the main smart watch 1100.

As described above, it can be seen that the present invention is basedon the technical concept that, in realizing a multifunctionalhigh-capacity wearable smart device by mounting a flexible semiconductorpackage in a band, a semiconductor package may be modularized andattached to a main body while being mounted in a band, a semiconductorpackage may be packaged in a rubber pack in units and selectivelymounted in a band integrally connected to a main body, or asemiconductor package may be configured as an independent band so as tobe separated from a main body. Many other modifications will be possibleto those skilled in the art, within the scope of the basic technicalidea of the present invention.

INDUSTRIAL APPLICABILITY

The smart device of the present invention may be used for healthcare,fitness, learning, living, office work, games, or music according to auser's purpose.

1. A wearable smart device comprising: a main body in which a basicmodule is mounted; a band in which at least one auxiliary module ismounted and which is selectively attached to and detached from the mainbody and is formed of a polymer material or a rubber material to bebent; a connector configured to electrically connect the main body tothe band; and a coupler configured to physically connect the main bodyto the band.
 2. The wearable smart device of claim 1, wherein: the basicmodule is a module having a smart phone function or a smart watchfunction; and the auxiliary module is a module for enhancing thefunction of the basic module in cooperation with the basic module andincludes at least one of a memory module, a battery module, a cameramodule, a speaker module, a light-emitting diode (LED) module, a sensormodule, and a display module.
 3. The wearable smart device of claim 2,wherein: the band is used for games, office work, or music; and theauxiliary module includes at least two memory modules and a batterymodule.
 4. A wearable smart device comprising: a main body in which abasic module is mounted; a band electrically connected to the main bodyand bent; and auxiliary modules having respective functions andselectively mounted in the band in a prefabricated manner.
 5. Thewearable smart device of claim 4, wherein: the auxiliary module ispackaged in a polymer material or a rubber material pack in units; and amounting slot in which the pack is mounted is formed in the band.
 6. Thewearable smart device of claim 4, further comprising an independent bandspaced a predetermined distance from the band and configured to transmitwireless data through short range communication with the basic module orthe auxiliary modules.
 7. The wearable smart device of claim 6, wherein:the independent band is a flexible, shrinkable, and closed ring type andincludes one or more independent modules; and the independent moduleincludes Bluetooth enabling wireless data communication through shortrange communication with the basic module or the auxiliary module, andperforms real-time data communication with the basic module.
 8. Thewearable smart device of claim 7, wherein the independent moduleincludes a wireless power consortium (WPC) coil for wirelessly chargingthe basic module or the auxiliary module through wireless powertransmission.
 9. A wearable smart device comprising: a main body inwhich a basic module is mounted; a band integrally connected to the mainbody and bent; and an auxiliary module formed with a flexiblesemiconductor package, embedded into the band, and electricallyconnected to the basic module, wherein the flexible semiconductorpackage includes: a flexible printed circuit board (PCB) including aflexible wiring pattern; a semiconductor die stacked on the flexible PCBand connected to the flexible PCB using wire bonding or flip-chipbonding; and a flexible mold configured to protect the flexiblesemiconductor die.
 10. The wearable smart device of claim 9, wherein:the flexible PCB is formed of polyimide; the flexible wiring pattern isa conductive film formed using flexible copper, titanium, or aluminum;the flexible semiconductor die is a memory device integrated on asilicon substrate not exceeding several tens of micrometers; and theflexible mold is formed of a polymer.
 11. A wearable smart devicecomprising: a main body in which a basic module having a smart computerfunction is mounted; and a band in which one or more batteries aremounted so as to enable wireless charging through WPC wireless powertransmission and so as to be bent or curved, wherein each of thebatteries includes: a wireless charging reception module configured toreceive an electromagnetic wave from a wireless charging transmissionmodule; and a capacitor module configured to store electric energygenerated in the wireless charging reception module.
 12. The wearablesmart device of claim 11, wherein: the wireless charging receptionmodule is arranged on the same substrate as the capacitor module so asto be alternately arranged at the same level; bending or curving mainlyoccurs in the capacitor module having a smaller thickness than thewireless charging reception module; and bending or curving mainly occursat a boundary between the wireless charging reception module and thecapacitor module.
 13. The wearable smart device of claim 11, wherein thewireless charging reception module includes a chip on board (COB)package in which an antenna tag is stacked on a substrate in a COBmanner and is covered by an insulating protective member.
 14. Thewearable smart device of claim 13, wherein the capacitor module includesan electric double-layer capacitor capable of repeatedly charging anddischarging.
 15. The wearable smart device of claim 13, wherein: thesubstrate includes a flexible substrate made of a polymer material; theantenna tag is a conductive film formed using flexible copper, titanium,or aluminum by a photolithography process or a printing process; and theprotective member includes an adhesive protective member made of asilicon material or a polymer material.
 16. The wearable smart device ofclaim 14, wherein the electric double-layer capacitor includes: aflexible substrate; a pair of electrodes provided on the flexiblesubstrate and arranged above and below the flexible substrate with aninsulating separator interposed therebetween; and a pair of conductivemetal covers configured to perform a current collecting function andcover upper and lower portions of the electrodes using a conductivebinder.
 17. The wearable smart device of claim 16, wherein: the flexiblesubstrate is made of a flexible polyethylene terephthalate (PET); theelectrodes are flexible activated carbon electrodes into which anelectrolytic solution is permeated; the separator is made of a flexiblepolypropylene capable of permeating ions; and the metal covers areflexible aluminum foils.
 18. The wearable smart device of claim 11,wherein: the band is replaceable in the main body; the band is formed ofa pair of bands at left and right sides with respect to the main bodyand the pair of bands are selectively attached to and detached from awrist of a user by buckles; and when the band is connected to the mainbody at one side, power of the main body is maintained even when theband at the other side becomes separated from the main body.
 19. Thewearable smart device of claim 18, further comprising: a connectorconfigured to electrically connect the main body to the band; and acoupler configured to physically connect the main body to the band. 20.The wearable smart device of claim 11, further comprising an independentband selectively fastened to the band, wherein a plurality of batteriesare mounted in the independent band.